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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf3eb1f26f367ff5f672c5a86dce9d5b61eb9e2ba21739ad219029c7ad16e07e' 
  AND token = 'zv6NLqJFVDWG75fN3kpnc4ozB85WDidmKzwcr46gAAo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.17915

JSON explain

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