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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c0b74ea95b92e470b0f2a09051206ccf35558369d26516a095d2e79d53493b77' 
  AND token = 'PAfU8RMWdfr6lc/A4DyGvYoXVtcZ+5/moIa2x5gqF9Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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