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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e91a876470f3a38de4a40c64f6ed9a931ac4defe148426c6d97b69d9e2eb170b' 
  AND token = 'JBX06nbexISO4R6J9Uou8UVMtmqzPbCp75sarz3GtwU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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