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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aef4e5e53e762b8ed76f77e3f07d309d8b4f6937f48db562c41ffaff954b68ec' 
  AND token = 'YEIl3DRUfqz2qk46dWRRuodmBD0yOa3GGJ4tbkmjv/g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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