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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '67096aaf6d28e4ec91a1c715929a61e952c53f8598b64e3a1aa0f2e31ce789dc' 
  AND token = 'yx/GGolHJR34ZTop+A44CxkyvkT62lWa/tZJsLdeqA0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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