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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '002569ac1fa77f1c169b710ca9bc122a8c123d68ce7e9d23b9c7ecaf22c012bf' 
  AND token = 'xukmOMfJ6C1KZ3D2zDNv5/C8qst3B81AvZCLG5h7XK0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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