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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '641f19914896b96dbbb427d5bb0803647c4ccabef3f1fa611e5d98dc51b91008' 
  AND token = 'Z5VrUsf+XV3tmXVCa22YR9bWfzaK8lfHBHilxEr1yO4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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