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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '94dceccddad13d0cac5ae7d729f14f5e610f5709e05e086e8d105db9a2024a96' 
  AND token = 'zTC7lIFxKRb1EbggR1s1+H1K+OZ6mvsheOibzkvqXng=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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