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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6882b06a77554649838feead6761b3431ddaf49a6ede591018f9bfd46132bb87' 
  AND token = 'q+w9ABqm1SEEMnCsTZ10Vu2r3MENn42uma5O+Mv+SvI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00057

JSON explain

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