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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '705710d15cd8f9be46c11b25a4a5f20ee6c444649c7a6031c694727e1c75b530' 
  AND token = '43OryhgG7/WqX4LbnfEVcTfwyveQ3I3MpB5bcQu6zeY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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