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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e09965b8614f78e4d9fb937e6a794ec50b02bcce08deb4f96c39941fe1c40aa8' 
  AND token = 'toyr+iAZh1mMNCwzEQ6NflJhSKQ76VEjehsZh+IyAXc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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