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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fa817a66fffcc62563b2da6bc7597e53770b8f968a9cb0c8e2ed40e09635ebe8' 
  AND token = 'PeYaaKboi7FPJt+ArtiKwzst4F+dlhqHsl3KUDgWfVY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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