Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4c9fd2a065fb1ee7613d86a4960f57477de945a1d16343923e44cbefc54031c2' 
  AND token = 'Y3aeEX5IneuVrtau3PrDZzUlCLnYDMnmAEkXv/1GD+w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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