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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9dd7ee612c33e99e7cea43364df3e716d9ecb3d4ba05f566db32db94d89a1873' 
  AND token = 'tOg2vu6I4t1lfKrHUsr1p4OD8GNQ+Y3QHMa43PeUC5I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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