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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cb5e9c222739acfe4fc40895275479a67fffcf8da2dcd3488606d4d5ad32c519' 
  AND token = 'wxM7JuQwLUNTeh6nBMDDM5PX4AGGiT5xbl5pGksh/30=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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