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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a0ea329c33d0de44ea84e9baf5808edd7b4e0493904e163ae9bb7fa27312cc2c' 
  AND token = 'berp6yCn2UbT6R07UYpd6EK4sWaeIBgkWjq32GEI6Ro=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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