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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c11052b92e12a23f49641c7ea0abc68c61dd059c325ede920c48c4848e231d87' 
  AND token = 'jQkelbJYBCCqbMX7bpCE70lz+M/bvDObuj0Y27yFL4E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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