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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9b32d823fa64ff9f3163cde50e4d7a2808d522a5b40a07e65943c54b8e233ddd' 
  AND token = 'X75v6b/tQ1E1CslMVSDaAbrbPxaMOhonQTyArAZn5yA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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