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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '58a9e08ae029c82d52d2c1767b74b0ed8119df30f748cd151003986b36e2d4a1' 
  AND token = 'koT3RL7kQa+/pyl9AvrWAtqvMmlviN77qoP7rhKloQ8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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