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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5898b982551140d2571ae43621d482706ee136ceb85b16ea7daaab029fa3bedc' 
  AND token = '3x7lvkq7e0WzSBcM/jtw/e1T2baJZxWck09UW4AkILA=' 
  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"
    }
  }
}