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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '26fa236b1bf7ef15fdcbcf9da5be02dad60c22691b24b9adc2004c7f2311daab' 
  AND token = 'Y/nd8MrFDiKl07iVAZ00doiUHwl39SK1GuAOcg2LlMQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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