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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0eec16a3ef1ca35caa23034eb9ed82ee4870cb7b44a5c3e786a3dcebc1a69943' 
  AND token = 'oogphpxaheXLYB0tr6hFiSJdT/t0vWamh2aqatpA6o0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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