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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f0822d19ece8fb0de33a96a1ab9c38d76c05fa490805a166a9a6f11766a7a0de' 
  AND token = 'EfFNDXAgvaVWkRbOx9HYt3P6epKM+zQyhKDvcFkEFvk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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