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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '59cc492f03c2d28501ab89c40022bff228d8fff6f3240e0843071497dddd3495' 
  AND token = 'cpR0hdDn9veRRg+QnK3rodg6JSpaEKk3odfv2Ihv7sg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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