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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd190a66554f2cceb38d1de8f0b13a14c8061042016513277ae242e9e1ad947b7' 
  AND token = 'YHftm0Uj2/bsisJ02Z/Zqwrvb410OyZz5pC27oaDoC0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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