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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07b05dc35c9c6c81ed86b665edd5ba782ebc3d3e4dd07407a101ea029c6cadaa' 
  AND token = '0qPP4rX5vnT7TK4+XGFCrW1IVdPMfCH87EUK2Bb1yiA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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