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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '36270d3f74207080e7fb84990934f997c478970d5f7b98b8d8019e387aeb3118' 
  AND token = 'RBPnCxWmHAaEI8mpt3jLBxM+MXAwBlj3b/jjrX0Mcs0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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