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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9a4ae18bfb2532c374e2b7c3d26ac3e6c1061ecf77d74bd8b9b884fa3bf361e7' 
  AND token = 'tIAI3csXvTXHlVO+24jgPMbboxEK2zboIy+T9eE8WTs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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