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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a164044d0557bfa0af7836786b18cd83444fa5385ccf9b892c3af2ffa231bb94' 
  AND token = 'Yos3Cef6o8a+BcxmUuMLvTYvzyvtrd87YPX1v5ZQuYM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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