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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c0f65a5274aa04698fedc07cc105a65614bcc22d201866713a802adb0f6707da' 
  AND token = 'PEz2aQgvdhf86Pt8i4SRwojHYeZH0Q7geGElQBp7Y6k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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