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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9c03782bf12d5dce7c4e275b73703f46455c164986d816da0566740ced41c296' 
  AND token = 'yr8UWbY5/SxmUwCrFPEWA0l8qXLODd3SrSBR8J26Row=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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