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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '27fcb57d3e6767f9fb3b9855f60b99dc26a496f76198f98754e596bb7b3828f0' 
  AND token = 'gB1Vf6fJ7W1gXgVM+7MRT5UC/IdYHQaCZh86Cd85akQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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