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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'e345371f47106d04a68c68c534d0c34e3d87ea8d7a8553ca0b0803b2cb9fb53b' 
  AND token = 'Onyw0RRLNHgu2beOa+xThHimh8sO5XhnDui9vMcnUo0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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