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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7566e1eea5ee97ea24c3275118d86dfbcecae06ad804078afb14d57ce284c754' 
  AND token = 'g22LZ+GNqH7CFgciwuwLVoHKMgO2FKJOC5q5vay4mDE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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