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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd62f3cdb39cf11b95fa2f2ec1eb6c33d52599b8b27533e2522fffbc823da37e7' 
  AND token = '8/x5/KLpsSbBnpsyRfO6LtiKZ/Vtt3NY55RpGD/rIQQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00064

JSON explain

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