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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '47ad6653a700a0d1e1ae5c6e7d03309dc889bee366a9121bdb389177e6c57020' 
  AND token = '/buu42U9pipR6d4Mhqf2bw13lauqNqrpfPEjciy3T24=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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