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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9284ae33a0a1e55da3bea8b7e2faaba4b33ccd783b811826584824835f812383' 
  AND token = 'BgnfP4NWYnR5h6OK5Kz2zVYi47ZmZbHX67hyOXPOVqg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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