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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd98da1e34d7309b06eeb1c5bf5071478ab228acc21fa43a3dd11b8ec750a160a' 
  AND token = 'EFRcWtchqXxgJtU7ggPrKCl47af0KE83gl47OLWPe04=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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