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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6a9f4162c68f40f961ba5c127f5931944b5b119def35f6f80e46f8e56ff7e860' 
  AND token = '3XbxDi3O4K/zszq7utPK8Qq77/p/KyW3uW88lC6gnug=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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