Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4d63208a30e215adc7c09b14da7ab307cbd411fde3cbc1c565e6ff287bf7f2f6' 
  AND token = 'g2b4Y9KUtDStT1Us6HVXnN3l/ZWLmKXXPXrn9WXKiqo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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