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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd65d6d63b2ab1a4b04f83a142ab4054d0dec3a6cf0dd5e2edec0148ea025e9e6' 
  AND token = 'T732lddCkUsd2uq3jlO+80ymgIWo62FfcpNeW6rcBV4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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