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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd4a3e8d6c3aa82b526c55732caf92e5be0a1ba9d832e9557ba9b957114e2bc0d' 
  AND token = 'HHXIdfPdG587JKIj4FlSjaeFBaUqMTnOatsXOB8bI1Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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