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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd0ad69bea36278d85ee6e0bb28b42156fed2bc8ed43b8192f4323b38afa4d23b' 
  AND token = 'ziRurbp3p/BndPhGXtkwxAeHS0Dnu9IlRa9iRa9Kudk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}