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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8ee8903d8baad6ac56f906e5d9b3b1111e46feb09659a5e9653e6c1f27eb8b48' 
  AND token = 'Cu19b453Cb8yTuEjhBcdc8eQomODXyv/Uy5m3nlfay0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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