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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '055a2117ffbeb3bd3b5d19c340479a334e67cf439df5d9810f0c0f62de3531ad' 
  AND token = 'dvdaPn4l8R/vfRhPMQBMf5X7riRE/y1/dC6LB3ovMC0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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