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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '651ef1e5c4cb012a5e74b9674d72c3b84e5f6aff326e18141503ef3f8a3e91b7' 
  AND token = 'rfN29ECy/xptkM9lLAP8XO6j/S8NuEZFyN+nvm25Zc8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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