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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0e16477e4a7b27814d9783d32be44ef7d54ed218bba6343a9b91883a102e1a13' 
  AND token = '5Rq8AGgy0sYuuHgBq+yadI9oOn2qq1VYmBDEtgiSRoQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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