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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '33139eb36b75ce780cf3a08e07ba7711cd13ca338403f2c5ffabe94ea3dcdde0' 
  AND token = 'Ct/XBrEYDyYAW5bnQ2jWtRYAizhIzw/fLvma17pSS/A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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