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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7805b4ce06be4ad5d02ba693da9ac78a31c2b3d25541e2488bbc65cd7c8daef8' 
  AND token = 'AeHH2qQ3i1pbI7FjtHAQQRoW0U5AqWTCazzjqX6C0TM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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