Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ef3a7239c1c696d10fae8d5ce2d66f9afd8fcf235b560df3e53e3ed69dcdc14' 
  AND token = 'DimdLzQC8UULPtUawIlw/pwZZWndsmd3rDSOQVCWUQk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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