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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f1dbfb0accda244e6c51d6b251189eb675cb652c1a218b38d5eb48d3b8c80dd9' 
  AND token = 'HreF96XttbGmdTDwRy/dfYdaUEXQN0m5/ax+e8x6aRs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}