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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32cb14ac9fcc81d7a5d6dc5933daac2c2bde9ddd1472157944da6739cfc5c4c2' 
  AND token = 'SJuJmJ11VIVO1t0BZo1uE06Ap/nF43X568NzgU6Tv+c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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